Braking control device for vehicle

Abstract

A braking control device for a vehicle is provided, which includes an operating amount detecting part configured to detect an operating amount of a brake pedal, a reaction-force giving part configured to generate a reaction force of the brake pedal, a braking-force generating part configured to generate a braking force for wheels, and an ECU electrically connected with them and configured to control the reaction-force giving part and the braking-force generating part, and set a braking characteristic in which the reaction force according to a stepping force of the brake pedal and a deceleration of the vehicle have a logarithmic relationship, and when the reaction force is above a given reaction force. The ECU controls the braking-force generating part based on the braking characteristic while making the deceleration for the reaction force higher than the logarithmic relationship.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a braking control device for a vehicle, and particularly to the braking control device capable of controlling behavior of the vehicle based on a braking characteristic which conforms to a human perception characteristic.BACKGROUND OF THE DISCLOSURE[0002]Conventionally, in a vehicle control, when a vehicle operator operates a brake pedal, a target operating amount is set based on an operating characteristic (control map) where a correlation between an operating amount of the brake pedal and a deceleration of the vehicle is defined, and the behavior of the vehicle is controlled based on the target operating amount. Meanwhile, in order to improve an operating feel of the operator, numerous controllers which perform a vehicle control conforming to the operator's sensitivity based on psychophysics are proposed. As expressions of a relationship between the physical quantity and the sensation (perceived intensity) in the form of a func...

AI Technical Summary

Benefits of technology

The present disclosure is about a braking control device that improves the operability of brake pedals and enables the vehicle to respond to any operating states. The device includes a module that sets the braking characteristics based on the reaction force of the brain caterpillar and the deceleration of the vehicle. This results in a perceivable deceleration for the operator, making the brake pedal easier to operate. The device also controls the braking force based on the reaction force, so that the operator can safely and quickly stop the vehicle in emergency situations. The device can adjust the deceleration to match the reaction force, even if it exceeds the normal level. This ensures that the operator has a smooth and responsive experience when braking.

Problems solved by technology

However, even if such a braking characteristic is set so that the reaction force of the brake pedal and the deceleration of the vehicle have the logarithmic relationship, there is still a possibility that the operator's intention does not match with the vehicle behavior.

On the other hand, when emergency braking is caused, for example, by a sudden appearance of an obstacle, since the operator's intention is independent of their consciousness before this moment and a higher braking characteristic is demanded, the previous braking characteristic may not meet the response currently demanded by the operator.

That is, it is not easy to achieve both the operability by the operator and the response of the vehicle at any operating state.

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